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Exterior Mirror Element With Wide Angle Portion - Patent 8061859

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Exterior Mirror Element With Wide Angle Portion - Patent 8061859 Powered By Docstoc
					
				
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Description: The present invention relates to exterior rearview mirror assemblies and, more particularly, to an exterior rearview mirror assembly having an auxiliary wide angle reflector portion or optic for providing the driver with a wider angle rearwardfield of view as compared to a substantially planar portion of the rearview mirror.BACKGROUND OF THE INVENTION It is known to provide a wide angle rearward field of view to a driver of a vehicle via a wide angle reflective element at one or both of the exterior rearview mirror assemblies. Such a wide angle rearward field of view may be provided via acurved mirror reflector, or an auxiliary wide angle reflective element may be provided at a portion of a generally planar mirror reflector, such as via a stick on curved auxiliary reflector element attached to the generally planar mirror reflector. Suchadd-on curved auxiliary reflectors may be provided at the front surface or first surface (the surface of the mirror reflector that is generally facing rearward and at least partially toward the driver of the vehicle) and provide a reduced image size (ascompared to the size of the generally planar reflector) wide angle rearward field of view that is readily viewable by the driver of the vehicle. However, such curved, auxiliary wide angle reflectors are additional components and add to the cost andmanufacturing complexity of the mirror assembly. Other auxiliary wide angle reflectors have been proposed, such as those described in U.S. Pat. Nos. 6,315,419; 7,097,312; and/or 6,522,451, which are hereby incorporated herein by reference in theirentireties.SUMMARY OF THE INVENTION The present invention provides an exterior rearview mirror reflector or reflective element having a generally planar (or slightly curved) principal reflector portion and an auxiliary wide angle reflector portion integrally formed at the mirrorsubstrate. According to an aspect of the present invention, an exterior rearview mirror assembly for a vehicle includ